Stripping two Decimal Points

Should be an easy function - Cannot put my arms around it...

[blaketar]

I would simply like to throw an error if someone inserts a US price with two decimal points (23.000.00)

The function could strip the first decimal point and return 23,000.00 but feel it would be easier to point out the error to the end user inputting the price.

Any suggestions?

[eelixduppy]

You could do something like this:

if([url=http://www.php.net/manual/en/function.substr-count.php]substr_count[/url]($price,'.') > 1) {
echo 'Error - too many periods!';
} else {
echo 'Good price - proceed.';
}

[borntobeweb]

You can also use regex for this:

if(!preg_match('/^\\d*(\\.\\d{0,2})?$/', trim($input_value))) 
 echo "not a valid amount (999.99)"; 

[camilord]

<?php

$inputValue = '99.9999.9.999.99'; // -> input here..

$explodedValue = explode(".", $inputValue); // -> explode the value, separator would be the point
$countValueOfPeriod = sizeof($explodedValue); // -> count the array
$limit = $countValueOfPeriod - 1; // -> get the last number for the array element

if ($countValueOfPeriod > 2) // -> check if the array has a lot of periods
{
$lastValue = $countValueOfPeriod - 1;
$PeriodPlacement = $countValueOfPeriod - 2;
echo $countValueOfPeriod . "<br>";
for ($i = 0; $i <= $limit; $i++)
{
if ($i == 0)
{
$newValue .= $explodedValue[$i] . ',';
}
else
{
if ($i == $PeriodPlacement)
{
$newValue .= $explodedValue[$i] . '.';
} else {
if ($i!= $lastValue)
{
$newValue .= $explodedValue[$i] . ',';
}
else
{
$newValue .= $explodedValue[$i];
}
}
}
}
} else {
$newValue = $inputValue;
}

echo $newValue;

?>